package com.ruoyi.common.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;

import javax.annotation.Resource;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import java.util.Map;

import com.baidubce.http.ApiExplorerClient;
import com.baidubce.http.HttpMethodName;
import com.baidubce.model.ApiExplorerRequest;
import com.baidubce.model.ApiExplorerResponse;

/**
 * 获取token类
 */
public class AuthBaiduUtils {

    /**
     * 获取权限token
     * @return 返回示例：
     * {
     * "access_token": "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567",
     * "expires_in": 2592000
     * }
     */
    public static String getAuth(RedisUtil redisUtils) {
        // 官网获取的 API Key 更新为你注册的  百度云应用的AK
        String clientId = "uzdfUO0q547rdj4Vw4hhoCrD";
        // 官网获取的 Secret Key 更新为你注册的  百度云应用的SK
        String clientSecret = "BkLzRGIwOBPbEW2EvKGtts4DGHYVdutN";
        return getAuth(clientId, clientSecret, redisUtils);
    }

    /**
     * 获取API访问token
     * 该token有一定的有效期，需要自行管理，当失效时需重新获取.
     * @param ak - 百度云官网获取的 API Key
     * @param sk - 百度云官网获取的 Secret Key
     * @return assess_token 示例：
     * "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567"
     */
    public static String getAuth(String ak, String sk, RedisUtil redisUtils) {
        String access_token = String.valueOf(redisUtils.get("accessTokenBaiDuAi"));
//        String access_token = "";
        if(EmptyUtils.isNotEmpty(access_token)){
            return access_token;
        }
        // 获取token地址
        String authHost = "https://aip.baidubce.com/oauth/2.0/token?";
        String getAccessTokenUrl = authHost
                // 1. grant_type为固定参数
                + "grant_type=client_credentials"
                // 2. 官网获取的 API Key
                + "&client_id=" + ak
                // 3. 官网获取的 Secret Key
                + "&client_secret=" + sk;
        try {

            URL realUrl = new URL(getAccessTokenUrl);
            // 打开和URL之间的连接
            HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.err.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String result = "";
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            /**
             * 返回结果示例
             */
            System.err.println("result:" + result);
            JSONObject jsonObject = JSON.parseObject(result);
            access_token = jsonObject.getString("access_token");
            int expires_in = Integer.valueOf(jsonObject.getString("expires_in"));
            redisUtils.set("accessTokenBaiDuAi", access_token, expires_in - 3600);


            return access_token;
        } catch (Exception e) {
            System.err.printf("获取token失败！");
            e.printStackTrace(System.err);
        }
        return null;
    }


    /**
     * 地址识别
     * @param text
     * @return
     */
    public static String getAddress(String text, RedisUtil redisUtils, int frequency) {


        String path = "https://aip.baidubce.com/rpc/2.0/nlp/v1/address";
        ApiExplorerRequest request = new ApiExplorerRequest(HttpMethodName.POST, path);
        // 设置header参数
        request.addHeaderParameter("Content-Type", "application/json;charset=UTF-8");

        // 设置query参数
        request.addQueryParameter("access_token", getAuth(redisUtils));
        request.addQueryParameter("charset", "UTF-8");

        // 设置jsonBody参数
        String jsonBody = "{\n  \"text\": \""+text+"\"\n}";
        request.setJsonBody(jsonBody);

        ApiExplorerClient client = new ApiExplorerClient();
        String result = "";
        try {
            ApiExplorerResponse response = client.sendRequest(request);
            // 返回结果格式为Json字符串
            result = response.getResult();
            System.out.println(result);
            JSONObject jsonObject = JSON.parseObject(result);
            //110 Access Token失效  111 Access token过期
            String error_code = jsonObject.getString("error_code");
            //frequency 运行次数 最大循环3次
            if(frequency <= 3 && ("110".equals(error_code) || "111".equals(error_code))){
                redisUtils.del("accessTokenBaiDuAi");
                frequency ++;
                result = getAddress(text, redisUtils, frequency);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

}